PAID UP ACCOUNT NOT UPDATED ON TRANSUNION

I HAD A FINCHOICE ACCOUNT THAT WAS HANDED OVER TO NRB - I PAID THE ACCOUNT IN FULL IN AUGUST 2018 - ON THE 3RD OCTOBER 2018 I RECEIVED A PAID UP LETTER WAS SENT TO ME - I WAS INFORMED BY THE AGENT THAT THE BUREAU WOULD BE UPDATED . I APP**** FOR CAR FINANCE IN NOVEMBER 2018 AND WAS DECLINED AS THE ACCOUNT WAS STILL REFLECTING ON TRANSUNION- I CALLED TRANSUNION ON 27TH DECEMBER AND THEY INFORMED ME THAT THEY HAVE STILL NOT RECEIVED AN UPDATE FROM FINCHOICE - I CALLED FINCHOICE AGAIN THIS MORNING AND WAS ADVISED THAT THE UPDATE WAS SENT ON THE 28TH DECEMBER - I WAS SUBSEQUENTLY TOLD THAT THE UPDATE COULD TAKE UP TO 3 WEEKS - MY QUESTION IS WHY WAS THE UPDATE NOT SENT IN OCTOBER AS I WAS PROMISED ?